Analysis was done for the Home Page of theme demo.
PageSpeed Insights fetches a site with a webkit renderer that emulates both mobile and desktop devices and takes into account characteristics of mobile networks. The results returned by the PageSpeed Insights API includes the following information: PageSpeed score, summary statistics for the page and PageSpeed results for rules based on general principles of web page performance.

1. PageSpeed score

The PageSpeed Score (0-100) indicates how much faster a page could be. A high score indicates little room for improvement, while a low score indicates more room for improvement. From the point of theme evaluating this characteristic shows how in the theme had taken into account the data processing, minification and optimal loading.

Desktop PageSpeed Score

85 / 100

Mobile PageSpeed Score

73 / 100

2. Page Statistic - Breakdown of page resources size

IMPORTANT! Sizes for HTML, text, CSS and JS resources in statistic are shown as for uncompressed ones.

Number and total size of all requests

Desktop

Mobile

Total size of all requests (considering the compression of HTML, text, CSS and JS resources)

1485 KB

1440 KB

Number of requests

97

96

As we can see from graph and summary table:

The amount of downloaded data for desktop and mobile devices is virtually identical (the difference is not over 10%).

Total page size does not exceed the reasonable values ​​for page loading on a mobile device.

The number of requests for desktop and mobile devices is virtually identical.

3. PageSpeed results

PageSpeed analyzes web pages using rules based on main principles of web page performance and generates result for each rule.
Following table shows results of the evaluation and recommendations for rules, which performance depends on the quality of the theme source code.